If 15% of a number is go and 40% of the same number is 80, find 25% of that number.

Based on what i know about mean, this doesn't add up.

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

What is the measure of the smallest angle in the diagram? 15 29 32 45